There are many ramifications that can surface as a result of a car accident; medical liens are one possibility. A lien is a legal claim placed against the property of another person. A car accident medical lien is a lien placed on the property or anticipated property, such as a settlement for personal injury, by some type of medical entity that seeks to be compensated for services rendered to said person. For example, if you owe a hospital money for services they rendered to you, and you have a pending claim against the other driver, the hospital has the legal right to place a medical lien against your anticipated settlement as a way for them to seek compensation for the treatment you received from them.